Portable derrick



J. HANSEN.

PORTABLE DERRICK.

APPLICATION FILED FEB. I2, 1915.

1 1 95,005 Patented Aug. 15, 1916.

"HE NORRIS FETERS co.. PNOTD LlTNO" WASNINGIUN. n c

UNITED STATES PATEN T ()FFTQEJ JENs HANSE1\T, 0F FAIai/ioNT, MINNESOTA.

PORTABLE DERRICK.

Application filed February 12, 1916.

To all whom it may concern:

Be it known that I, JnNs HANSEN, a citi zen of Denmark, residing at Fairmont, in the county of Martin and State of Minnesota, have invented certain new and useful Improvements in Portable Derricks, of which the following is a specification.

The invention relates to an improved portable derrick or lifting. machine, designed primarily for the use of farmers and mechanics and constructed with a view to providing a derrick or lifting machine in which the main beam is designed for free rotation on the base standard and readily separable from or associated with such standard; with provisions for securing the main beam in limited rotary relation with, or in any desired fixed relation with the main standard.

The structure involves a base on which is secured a standard, on the upper end of which is rotatably mounted a main beam, the main beam being provided at one end with a main or lifting cable adapted to be guided through guiding elements on the base and being operated by any preferred type of geared Windlass also mounted on the base, the main beam having a plurality of adjustable connecting elements, adapted to engage any one of a plurality of members mounted on the base to fix the main beam for limited rotary relation to the base, or any desired fixed relation thereto.

The invention in the preferred form of details will be described in the following specification, reference being had to the accompanying drawings, in which the figure represents a perspective view of the improved portable derrick or lifting machine.

The improved lifting machine comprises a substantial base 1, and from the base is a main standard 2, preferably rectangular in cross section, and held in fixed relation to the base, through the medium of base strips 3, secured to the base and connected at their upper ends to the standard. The upper end of the standard is provided with a supporting column 4, circular in cross section, and terminating at the lower end in a cap 5, designed to fit the upper end of the standard 2, and to which cap the upper ends of the brace rods 3 are preferably secured, thus additionally securing the cap in place. The column is provided at the upper end with a centrally arranged vertically disposed rod 6, for a purpose which will later appear,

Specification of Letters Patent.

Patented Aug. 15, 1916.

Serial No. 77,930.

Securedupon the base is a holding mem ber 7, in the form of a rail having the ends 8 secured to the base adjacentthe side edges andat a point remote from one end edge, the rail being extended from one securing point to the other in practical coincidence with the same edge of the base, the rail, however, being elevated throughout its length from the base, and being at its central point connected to the base by an upright 9. At the relatively remote or opposite corners of the base, there is provided at each of said corners further holding members 10 in the form of eyes. Secured upon the braces 3, preferably upon that pair adjacent the holding member 7, are cable guiding members 11,,in'the form of cylindrical bars or rods rotatably mounted at their upper ends in a bracket 12 secured to both brace bars and at their lower ends in'brackets 13 secured to the respective brace bars. The guiding lines relative to the base, and inclined upwardly and inwardly with respect to the base. On the base, on the side of the main standard opposite the: guiding elements 11, is mounted a geared Windlass 14, the details of which are not important, it being contemplated that any appropriate Windlass may be used at this point. Intermediate the Windlass and standard 2 is arranged a brake 15, comprising a fiXed bar 16 secured to the base and a movable bar 17 connected to the first bar by links 18, one of the links on each side, preferably the central length, forming the terminals of a Y-member 19, which constitutes an operatinglever or handle for the brake. Beyondthe Windlass relative to the main standard 2 is arranged a spaced snubbing post 20.

A main beam 21 of an appropriate length and size in cross section is designed for cooperation with the base, said beam, at a point somewhat closer to one end than to the other, being formed with an opening 22, transversely therethrough, to receive the rod 6. The beam is provided with a brace 23 secured at its terminals, and made up preferably of riveted strips or plates connected to the beam by spreading the strips to partly embrace the beam as at 24:. The brace is secured to the underside of the beam and depends therefrom on a curved line, the maximum depth from the beam, as Well as the central point of the brace, being in vertical line with the opening 22 of the beam.

members are thus arranged on convergent At this point, the brace strips are spread to form circular opening designed to more or less snugly fit the column 4, the relative positions and sizes of the parts being such that when the beam is in position, as shown in the drawings, the lower edge of the brace '23 will rest upon the upper surface of the collar 5, while the lower surface of the beam, or more properly a wear plate 26 secured to such surface, will bear upon the upper end of the column 4. The beam is thus rota tably supported relative to the main stand ard through the medium of the brace 23 engaging the column 4, and the opening 22 fitting over the pivot pin 6.

The beam, above and to one side of the opening 22, is provided with a U-bracket 27, which supports a roller 28. Brace rods 29, disposed in parallel relation, pass over the top of a transverse rod 30 secured in the bracket, and extend to the respective ends of the beam, each end of the beam having brace strips 31 secured on the respective sides thereof to receive the connections of the brace rods. The brace strips 31 for the shorter end of the beam are in the form of a U-plate which extends longitudinally of the beam on one side, around the end and longi tudinally of the beam on the other side. The brace rods, which are provided with turnbuckles 32, provide for effectively bracing the respective ends of the beam from what may be termed its pivotal support.

The beam, at the end of the shorter length, is formed with vertically extending openings 33 in which are mounted sheaves or groove rollers 34, a single sheave or roller 35 being mounted in an opening 36 at the opposite end of the beam. The main hoisting or lifting cable 37 is secured at one end to an eye 38, depending from the beam adjacent the sheaves 34, from which the cable is connected to a double sheave block, 39, having terminal connection 40 for engagement with any article to be lifted, the cable passing, of course, over one of the sheaves 34 in arranging for its connection through the double sheave block. The main length of the cable passes from the block over the re maining sheaves 34, lengthwise the beam, over the roller 28, over the sheave 35, and through the beam, to and between the guides 11, over a sheave 41, arranged in an opening 42, in the lower end of the main standard, and between the bars 16 and 17 of the brake device and onto the drum of the Windlass.

At the free end of the beam on the long side thereof, there is secured, through the medium of U-shaped hangers 43, independent cables 4445, threaded at the respective ends through double sheave and single sheave blocks 4647, respectively. The latter having members 48 to which the free terminals of the respective ropes may be secured, if desired, the single sheave blocks 48 being preferably provided with hooks 49, and the double sheave block being connected to the hangers 43, by coupling 50.

The lifting machine thus constructed, is, as will be readily apparent from the desciption and drawing, designed principally as a portable device which will be readily moved from place to place and which, as will also be apparent, when not in use, may occupy a comparatively small space, by lifting the beam from its pivotal support and disposing it in any other convenient position. When in use, it is obvious, that the hooks 49, or what may be termed, the positioning cables 4445, may be engaged with either side of the holding member 7 and tightened or adjusted to permit any limited rotary movement of the beam desired. The swinging of the beam on its pivot provided such action occurs in use will in no wise interfere with the operation of the main hoisting member, as it is apparent that the guides 11, will provide for easy running of such cable in practically any angular position thereof. Of course, the main cable is operated through the Windlass as a general proposition, although it is apparent that if desired it may be disconnected from the Windlass and passed between the snubbing posts 20, and connected to draft animals, or operated by hand, the snubbing posts providing for securing it in any desired position. The main beam may be completely reversed from the position shown in the drawing, and the hooks 49, either or both of them, engage with the holding members 10, and the cables 44 -45, tightened, or adjusted relative to each other, to fix the beam in any desired relation, thereby rendering the beam stationary as may be found desirable in some instances.

The main cable may be operated as effectively when the beam is reversed as when'the beam is in the position shown in the drawing, as the guiding means provides for permitting easy running of such cable. It is to be understood, that the brake described and shown provides an effective control by the operator over the too free running of the cable in the lowering of the load, the brake, together with the Windlass, providing a means for most effectively and completely controlling the main hoisting cable by the operator.

The various parts of the structure, except the brace, holding members and the like, are preferably constructed of wood, although the use of metal in this respect is contemplated, if desired. The essential idea is the provision of a portable derrick or lifting machine, which, while sufliciently strong for all ordinary purposes, is yet sufiiciently light to permit its ready transportation.

What is claimed as new is:

1. A portable lifting machine including a base, a standard rising therefrom, a beam rotatably mounted on the standard, a holding member carried by the base and including an elongated bar, and a connector carried by the beam to slidably engage the bar, said connector comprising spaced sheave blocks, and the cable cooperating therewith to adjust the sheave blocks for varying the length of the connector.

2. A portable lifting machine including a base, a standard rising therefrom, a beam rotatably mounted on the standard, a holding member carried by the base and including an elongated bar, and a connector carried by the beam to slidably engage the bar, said connector comprising spaced sheave blocks, and the cable cooperating therewith to adjust the sheave blocks for varying the length of the connector, and a main lifting eagle operative through the beam and standar 3. A portable lifting machine including a base, a standard rising therefrom, a beam rotatably mounted on the standard, a holding member carried by the base and including an elongated bar, and a connector carried by the beam to slidably engage the bar, said connector comprising spaced sheave blocks, and the cable cooperating therewith to adjust the sheave blocks for varying the length of the connector, and a main lifting cable operative through the beam and standard, means carried by the base to operate the main lifting cable.

at. A portable lifting machine including a base, a standard rising therefrom, a beam rotatably mounted on the standard, a holding member carried by the base and including an elongated bar, and a connector carried by the beam to slidably engage the bar, said connector comprising spaced sheave blocks,

and the cable cooperating therewith to ad just the sheave blocks for varying the length of the connector, and a main lifting cable operative through the beam and standard, means carried by the base to operate the main lifting cable, and a brake carried by the base to receive the main lifting cable.

5. A portable lifting machine including a base, a standard rising therefrom, a beam rotatably mounted on the standard, a holding member carried by the baseand including an elongated bar, and a connector carried by the beam to slidably engage the bar, said connector comprising spaced sheave blocks, and the cable cooperating therewith to adjust the sheave blocks for varying the length of the connector, and a main lifting cable passing through the respective ends of the beam, and terminally secured to one end of the beam, the opposite end of the cable passing through and beyond the main standard.

6. A portable lifting machine including a base, a standard rising therefrom, a beam rotatably mounted on thestandard, a holding member carried by the base and including an elongated bar, and a connector carried by the beam to slidably engage the bar, said connector comprising spaced sheave blocks, and the cable cooperating therewith to adjust the sheave blocks for varying the length of the connector, and a main lifting cable passing through the respective ends of the beam, and terminally secured to one end of the beam, the opposite end of the cable pass ing through and beyond the main standard, braces intermediate the main standard, and braces and guides for the main lifting cable carried by the braces.

In testimony whereof, I aflix my signature in presence of two witnesses.

JENS HANSEN. Witnesses:

Krns'rmn HANsEN, E. R. FLYGARE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

